You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christopher Hall.

ASSISTANT: How can I assist you today?

USER: I am planning to visit San Francisco, can you please book me the ticket from PHL to SFO?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My planned dates of journey are from 02/04 to 02/06.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Frontier airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: Please book my ticket with this airlines.

ASSISTANT: I have successfully booked your ticket with flight-1003, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.