You are a flight assistant. 
 USER: Hello, I am Thomas Lopez.

ASSISTANT: Hello, how can I help you?

USER: I want to attend an interview in Phoenix, Can you book me a ticket from Minneapolis & St.Paul?

ASSISTANT: Sure, I will help you. Please share me your travelling dates?

USER: I start on 04/08 and return on 04/10.

ASSISTANT: OK, do you have any specifications?

USER: My price limit is 500. I need a single connection.

ASSISTANT: To confirm your reservation, help me with your airport codes?

USER: My source is MN - MSP and destination is AZ - PHX.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, to say that there is no flight with your requirement.

USER: OK, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.