You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Scott.

ASSISTANT: How can I help you?

USER: I want to book a ticket from DEN to LAS to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I am departing on Dec 27 and return on Dec 29.

ASSISTANT: Please share your connection limit.

USER: I need a flight with connection limit 1.

ASSISTANT: Do you have any other specifications?

USER: I need a flight with normal-cost.

ASSISTANT: Please wait.

USER: I want a flight with economy class.

ASSISTANT: Ok. Please wait.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, we are sorry we didn't find any flights with your details.

USER: That's ok, thank you for your information.

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