You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, may I know the planned travel dates?

USER: I would like to take off on Feb 20 and return on Feb 22.

ASSISTANT: Please provide me the name.

USER: My name is Helen Rodriguez.

ASSISTANT: Do you have any specifications?

USER: I would like to depart during afternoon time.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

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

ASSISTANT: Thank you for reaching us.

USER: You are welcome.