You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning.

USER: Good morning, myself Christopher Miller.

ASSISTANT: How is your day, Miller.How can I help you?

USER: I want to book a ticket from DEW to HOU, can you please check and say me is there any flight available?

ASSISTANT: May I know your travel dates?

USER: My travel dates are from 04/07 to 04/09.

ASSISTANT: Please wait a while, Miller.

USER: Sure.

ASSISTANT: There is no flight available on 04/07 to HOU, Miller.

USER: That's fine, no problem. Thank you for checking.

ASSISTANT: Thanks for reaching us.