You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good evening.

USER: Is this is a flight ticket booking agency?

ASSISTANT: Yes, you are at right place. May I know how can I assist you?

USER: Actually, I am trying to contact you from past 2 days. I have to meet my grandfather as he is admitted in the hospital at Austin. Can you please help me to book the flight ticket for me?

ASSISTANT: Oh! Sorry for that, I'll definitely help you in booking the ticket. Can you please let me know the codes of starting and ending points of your journey?

USER: For me SFO is the nearest airport. So I want to depart from CA-SFO to reach my destination, that is TX-AUS.

ASSISTANT: Fine, please let me know on which dates are you wish me to check for the flights availability.

USER: Sure, I want to depart on 09/16 and also please book the return ticket on 09/18.

ASSISTANT: Ok, before going to the next process, can I have your good name please?

USER: My name is Robert Taylor.

ASSISTANT: Robert, please be on hold while I'll check for the best flight service for you.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, Southwest airlines is having a flight on that route with travelling charge of 100. Shall I proceed for booking?

USER: That's perfect for me, you can proceed for booking the ticket.

ASSISTANT: I have successfully booked you the ticket in flight-1005, have a safe and happy journey.

USER: Happy to hear that, thank you very much for helping me.

ASSISTANT: It's my pleasure to help you, thank you for utilising our service.