You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please help me to book a connecting flight ticket from Denver to attend a business meeting in Houston.

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Thank you. Sure, I need to depart on 12/15 and my return date will be on 12/17.

ASSISTANT: Please share me your airport codes.

USER: My boarding and landing airport codes are DEN and IAH.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I need to return in the afternoon time.

ASSISTANT: Before checking with the airlines, may I know your name please?

USER: I am Amanda Roberts.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, no issues. Thank you for you information.

ASSISTANT: Thank you for reaching us.