You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit a Houston in IAH from DCA. Can you find  a ticket for me?

ASSISTANT: Sure, can you help me with your preferable dates of travelling?

USER: Ok, my preferable dates are 03/30 to 04/01. Ok, make sure that the connection limit is 1.

ASSISTANT: There is a flight with your requirement, can I proceed?

USER: Yes, proceed.

ASSISTANT: Your ticket has been booked with Spirit airline, and flight number is 1009.

USER: Ok, thank you for your help.

ASSISTANT: May I know your name?

USER: Yes, I am Michael Wright.

ASSISTANT: Thank you.