You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: Please make a flight booking from TX - DFW under the name of Brandon Carter.

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned dates are from 10/12 to 10/14.

ASSISTANT: Let me know your source code.

USER: My destination code is DC - DCA.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: I am sorry to inform that there is no flight found with your requirements.

USER: Thanks for your kind information.

ASSISTANT: Thanks for reaching us.