You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I have got an invitation to visit NASA Space Center in Houston, TX - HOU. So I am planning to go on 12/10 with my children. Can you book a ticket from Houston, TX - IAH?

ASSISTANT: Sure, can I have your return date?

USER: After completion of my visit, I will return on 12/12.

ASSISTANT: Do you have any other preferences?

USER: Yes, 200 is my price limit and I need one connection.

ASSISTANT: Ok, please wait for a minute. I will check the availability of flights and get back to you.

USER: OK.

ASSISTANT: Thanks for being patience.

USER: OK.

ASSISTANT: To proceed further, may I know your good name please?

USER: Sandra Taylor is my name.

ASSISTANT: Thanks for providing your name. Sorry for the inconvenience, there were no flights found with your given credentials.

USER: Ok, That's not a problem.

ASSISTANT: Thanks for your approach, have a good day.

USER: Thanks for the response.