You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Nancy Scott from Houston.

ASSISTANT: Nice meeting you Scott.

USER: Thanks, nice to meet you too. I would like to go Denver next week, can you please book a direct flight for me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of travelling?

USER: I want to take off on 11/23 and book my return ticket also on 11/25.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I want to fly from IAH and destination airport is DEN.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: Oh! It's ok no problem, I will go with another airline.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your service.

ASSISTANT: Welcome.