You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I need to book a ticket from HOU to PHL. Could you book a ticket?

ASSISTANT: Sure, when are you planning to make your trip?

USER: Trip dates are from Mar, 5 till Mar, 7.

ASSISTANT: How many connections are you looking for?

USER: I need single connection flight.

ASSISTANT: Do you need a low cost airline or normal cost airline?

USER: I prefer normal-cost airline.

ASSISTANT: Is there any other requirements?

USER: I would like to depart in the evening.

ASSISTANT: May I know your name?

USER: My name is John Martinez.

ASSISTANT: Ok, there is a Delta airline with flight number 1003 is going on your with airfare of 100 and returns in the evening. Is that fine?

USER: Proceed for booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.