You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Can you please book a flight ticket from DEN to PHX?

ASSISTANT: Sure, can I know your travel dates to search the flight?

USER: Thank you. I have planned my travel dates as Mar 08 and Mar 10.

ASSISTANT: Ok, please tell me your name to proceed further.

USER: Sure, myself Timothy Campbell.

ASSISTANT: Ok, do you have any specifications?

USER: I would like to depart in morning time so please make sure that.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure but I am looking for direct flight so check with that.

ASSISTANT: Sorry to inform you that, there is no flight found with the dates you have given.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Most welcome.