You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Dennis Gonzalez here.

ASSISTANT: What help that you are expecting from my side?

USER: I want to book a ticket from Houston, my preferable airport codes are from IAH to SEA. Can you help me in that?

ASSISTANT: Sure, I will definitely help you in that one. Can you please mention your planned trip dates?

USER: Ok, my respective travelling dates are 07/15 and 07/17.

ASSISTANT: Give me some time to check the flight on your trip dates.

USER: Sure, I will Wait for your information.

ASSISTANT: I am sorry to say that, no airlines is providing a flight for you to travel to your destination on your trip dates.

USER: No problem, thanks for checking.

ASSISTANT: You are most welcome and have a great day.