You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hell, how may I help you?

USER: I am planning to visit a NASA space center in Houston, so please book a flight ticket from LGA to IAH.

ASSISTANT: Sure, please share your journey dates?

USER: I will start on Mar 02, return on Mar 04.

ASSISTANT: Do you have any specifications?

USER: My return time should be evening.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: My name is George Lee.

ASSISTANT: We found a flight in Delta airlines, flight number is 1007 with single connection and price is 100 economy class. Shall I proceed?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.