You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: I am Jack Jones here. Can you help me to book a ticket from DEN to SFO?

ASSISTANT: Sure, we are glad to help you. Can you please let me know your connection limit?

USER: My travel dates are Jan 20 and  Jan 22 respectively. Make sure that I need a direct flight.

ASSISTANT: Do you have any airline preference?

USER: I am comfortable with any airlines.

ASSISTANT: Is there any more specifications regarding your journey?

USER: Nothing from my side .

ASSISTANT: Thank you for your details, please be on hold.

USER: Take your time.

ASSISTANT: We found a direct flight with American airlines, price is 100 in economy class. Shall I proceed?

USER: Pleas go for booking I am ok with your specifications.

ASSISTANT: Your ticket has been reserved with 1005 flight number.

USER: Thank you for information provided.

ASSISTANT: Thank you for choosing our services, have a safe journey.