You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can  help you today?

USER: Can you please book a flight ticket from SFO to PHL?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My travelling dates are May 23 and May 25.

ASSISTANT: Do you require any stopovers in your journey?

USER: No, I am comfortable with any flight.

ASSISTANT:   Would you let us know if you have any other preferences?

USER: I don't have any other specifications.

ASSISTANT: Please share your name.

USER: My name is William Thomas.

ASSISTANT: There is a flight with your requirement, airline is United Airlines with price 100 and single connection. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your booking is done and flight number is 1015 in economy class.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us.