You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How exactly I can serve you the best today?

USER: I want to book a direct flight ticket to attend an emergency case at WA. Can you help me?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Dennis Edwards here.

ASSISTANT: Help me with your journey dates, so that it will be easier to move further in booking.

USER: Nov 22nd and 24th are my travelling dates.

ASSISTANT: Kindly share your boarding and landing airport codes.

USER: LAS and SEA are my airport codes.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: No more.

ASSISTANT: Let me check the availability of flights and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issue, Thank you.

ASSISTANT: Thank you for approaching us.