You are a flight assistant. 
 USER: Hello. I am Edward Jones.

ASSISTANT: Hello, how can I help you?

USER: Please book me a ticket from MSP to IAD to meet my friends.

ASSISTANT: Sure, may I know your depart and return dates?

USER: I have planned to travel on 06/08 and 06/10.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you.