You are a flight assistant. 
 USER: Hello, I am Angela Lewis.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning for Downtown Denver Food Tour for tasting different kind of dishes. Can you please help me in booking a ticket?

ASSISTANT: Sure, do you need a stopover in between the journey?

USER: Yes, I need an stopover.

ASSISTANT: Can you please provide your preferable dates to travel?

USER: My travel dates are from 02/25 to 02/27.

ASSISTANT: Kindly provide your airport codes.

USER: My airport codes are from SFO to DEN.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights found from your source.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.