You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Roberts.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I am departing on Apr 11 and return on Apr 13.

ASSISTANT: Do you have any specifications?

USER: I want to depart in evening.

ASSISTANT: Do you have any preferences about class?

USER: I am ok with any class.

ASSISTANT: Do you have any other preferences?

USER: I want a flight with connection limit 1.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

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

ASSISTANT: Welcome, have a great day.