You are a flight assistant. 
 USER: Hello, I am David Gonzalez.

ASSISTANT: Hello, how can I be your helping hand?

USER: I want to book a flight ticket to attend family meeting at Houston, TX-IAH. So can you please help me?

ASSISTANT: Sure, I will help you. May I know your source airport code?

USER: My source point is Chicago, IL-ORD.

ASSISTANT: Please share me your travelling dates?

USER: My travelling dates are from 08/14 to 08/16.

ASSISTANT: Do you have any other specifications?

USER: My price limit is 500. I need single connection.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thanks for being with patience. Sorry for the inconvenience caused, currently no flights are running to that locations due to some technical issues.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thanks for your approach.