You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please help me out in booking the ticket from LGA to PHL.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates will be 07/18 to 07/20........

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Please provide me the name.

USER: Debra Clark is my name.

ASSISTANT: Sorry, there is no flight available for your desired dates.

USER: That's ok. Thank you for informing.

ASSISTANT: Thank you for reaching us.