You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Barbara Thompson, I would like to fly from PHX to DCA to attend my college event, so can you help me in this?

ASSISTANT: Sure, help me with your travelling dates?

USER: My travelling dates are 09/18 and 09/20.

ASSISTANT: Give me a minute.

USER: Ok, I will wait for your reply.

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

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Thank you for reaching us.