You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Carter.

ASSISTANT: How may I assist you today?

USER: I am planning to attend music concert at BOS, can you please help me with booking a flight ticket from DEN?

ASSISTANT: Sure, when you are planning to travel?

USER: Sure, I would like to take off on Feb 1 and return on Feb 3.

ASSISTANT: Please share me your specifications.

USER: I would like to depart during morning time.

ASSISTANT: Is there any class preference?

USER: No, but I need a flight with 1 connection.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.

USER: You are welcome.