You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to go to a movie with my friends in Houston, IAH, so will you help me to search a flight from Houston, IAH?

ASSISTANT: Ok, can you provide your preferable dates?

USER: My preferable travel dates are 07/28 and 07/30.

ASSISTANT: Give me a moment. May I know your name?

USER: Ok, take your own time. My name is Donna Nelson.

ASSISTANT: Flight which travels AA airlines with 1 connection limit, costing 100.Shall I book it for you?

USER: Yes, please book the ticket.

ASSISTANT: Flight 1021 has been booked successfully.

USER: Thanks a lot for your help.

ASSISTANT: Most welcome.