You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Thomas Thomas. Can you help me in booking a flight from PHX to DTW?

ASSISTANT: Sure, may I know your dates of journey?

USER: My travelling dates are 05/31 and 06/02.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: That is fine. Thank you for your help.

ASSISTANT: Thank you for availing us.