You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am willing to travel to Washington for submitting my documents in the company where I got job.So, can you assist me to book a flight ticket from Houston, TX - HOU?

ASSISTANT: Sure, may I know your travelling dates?

USER: Yes, my travelling dates are 04/06 and 04/08.

ASSISTANT: Please, can I know your destination.

USER: My destination is Washington, DC - DCA.

ASSISTANT: Please, wait a moment let me check the availability of flights. May I know your name?

USER: Ok, sure.I am Daniel Smith.

ASSISTANT: Ok Smith, here no flight are available in your route.

USER: Ok, fine, not a problem.I will go with another alternatives to reach my destination.

ASSISTANT: Ok, thank you for reaching us.

USER: Ok, thank you for your services.