You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Timothy Turner here.

ASSISTANT: What type of service you are expecting from us?

USER: Can you please help me in booking the ticket from SEA to IAH? As I'm planning to visit Houston.

ASSISTANT: Sure, may I know your planned trip dates?

USER: Sure, my planned departure and return travel dates are 07/26 and 07/28.

ASSISTANT: Wait for a minute.

USER: Sure, take your own time.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Oh! That's ok, I'll reach my destination by some other mode of transport. Thank you anyways.

ASSISTANT: Thank you for consulting us.