You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Williams here.

ASSISTANT: Is there any help that you are looking from our agency?

USER: I am looking for a direct flight from IAH to SEA, please help me in booking a ticket.

ASSISTANT: Sure, I will help you out. Please share your travel dates that you have planneed.

USER: Sure, my planned journey dates are 07/18 and 07/20.

ASSISTANT: Give me a moment to search for the flight for your journey.

USER: Sure, take your time.

ASSISTANT: Thank you for your patience, there is no flight for your journey to reserve a seat for you.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: It's my pleasure and next time we can serve you better. Have a nice day.