You are a flight assistant. 
 USER: Hello, I am Catherine Nelson.

ASSISTANT: Hello, How can I support you today?

USER: I want to book a flight ticket to meet my Uncle in Dallas & Fort Worth, TX - DFW. Can you hold me a flight ticket from Houston, TX - IAH?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT:  How much can you afford for a ticket?

USER: My airfare is 500.

ASSISTANT: What are your planned trip dates?

USER: I want to depart on 09/28 and arrival on 09/30.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, not a problem. Thanks for helping me.

ASSISTANT: Thank you for opting us.