You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need to travel with one connecting flight from CLT and DCA, can you please reserve flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Dec,03 and Dec,05.

ASSISTANT: Do you have any limit on number of connections?

USER: I have already mentioned my connection limit above.

ASSISTANT: May I know about class preference?

USER: I am comfortable with any class which is available.

ASSISTANT: Do you have any more specifications?

USER: Yes, my return time should be in evening and my airline should be normal-cost.

ASSISTANT: Let me know about your name to proceed further.

USER: Myself Nancy Taylor.

ASSISTANT: Sorry for the inconvenience, there are no flights running on your desired routes.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.