You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know how best I can help you today?

USER: I would like to meet my friend at Denver, will you help me in booking the connecting flight from DCA to DEN?

ASSISTANT: Sure, we are here to help you in booking. Do you need a flag stop in between your journey?

USER: I have mentioned.

ASSISTANT: Kindly share if you have any class preference.

USER: I prefer business class.

ASSISTANT: Please share your planned travelling dates to proceed further.

USER: My travelling dates are Aug 20 and Aug 22.

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

USER: Make sure that my depart time must be in evening.

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

USER: Myself Linda Young.

ASSISTANT: Thank you for sharing your journey details, please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.