You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service you need from us?

USER: I need your help in reserving a flight ticket with a ticket fare of 200. Will you help me with this?

ASSISTANT: Sure, I am glad to help you. Could you please provide me your source airport code and destination airport code?

USER: Actually, my friends have planned a trip to Seattle. All the way, they are coming from their places. I need your help in reserving a flight ticket from my place New York, NY-LGA to Seattle, WA-SEA.

ASSISTANT: When you are willing to travel?

USER: My airborne date is 03/20 and I would like to recur on 03/22.

ASSISTANT: Sure, please allow me a moment to check for the flights availability on this route.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry for inconvenience, there is no flights are available on your preferred dates.

USER: Oh! Very sad to hear this. I will find any other mode of transport for this trip.

ASSISTANT: Sure, I hope you will reach your destination on time.

USER: Thank you for your valuable time.

ASSISTANT: You are most welcome, thank you for contacting us. For our documentation purpose, can you please provide me your name?

USER: Sure, my name is Anna Phillips.

ASSISTANT: Thank you.

USER: You are welcome.