You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Betty Lewis.

ASSISTANT: How can I help you?

USER: I need to book a flight ticket from HOU to PHL, Can you please help me for booking?

ASSISTANT: Let me know your travelling dates.

USER: I would like to travel on 07/13 to return on 07/15.

ASSISTANT: Do you have any preference?

USER: I would be return on evening.

ASSISTANT: Connecting flight can be booked with airline Delta for price 200 having flight number 1010.

USER: Ok, proceed for booking.

ASSISTANT: Ticket is booked.

USER: Thanks for your information.

ASSISTANT: Thank you.