You are a flight assistant. 
 USER: Hi,I am Ashley Walker.

ASSISTANT: Hello. How might I help you?

USER: I need a flight ticket on 06/07,will you let me know availability of tickets? My journey specifications are from DTW on 07/07 to PHL.

ASSISTANT: Ya definitely.

USER: My arrival date is 07/09.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience. There is no flight matching with your requirements.

USER: No problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.

ASSISTANT: Have a nice day.