You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I planned to meet my nephew in HOU, can you please help me to book a flight ticket from PHX?

ASSISTANT: Sure, when do you want to travel?

USER: I prefer to travel on Jul 16 and Jul 18.

ASSISTANT: Do you have any particular timing to travel?

USER: No.

ASSISTANT: Which airline do you prefer?

USER: I prefer to travel in a normal cost airline.

ASSISTANT: Can I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: We found a flight on Delta airline, flight number 1002 with the fare of 200.

USER: Ok, please confirm my booking.

ASSISTANT: Can I know your name?

USER: I am Raymond Walker.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.