You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from DEN to PHL, can you help me?

ASSISTANT: Sure, may I know your preferable travel dates?

USER: My travel dates are May 06 and 08.

ASSISTANT: May I know your other specifications?

USER: I prefer economy class.

ASSISTANT: May I know your name please?

USER: I am Katherine Clark.

ASSISTANT: Thank you for you information, please wait.

USER: Sure, I need a connecting flight.

ASSISTANT: Sorry, there is no flight obtained on your journey dates to book a flight ticket.

USER: No problem, thanks for checking.

ASSISTANT: You are most welcome and thank you for reaching us.