You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Could you please help me in booking a flight ticket with the name of Jerry Nelson?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My trip dates are 09/09 - 09/11.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are from TX - HOU to reach DC - DCA.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time.

USER: My pleasure.

ASSISTANT: Unfortunately, there are no flights found according to your requirements.

USER: It's ok, not a problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.