You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Ashley Hall. I am planning to travel from LGA to HOU, can you help in booking?

ASSISTANT: Ok, can I have your planned dates to go?

USER: My travelling dates are 01/04 to 01/06.

ASSISTANT: Wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no flight available on your route.

USER: That's ok, thank you for your help.

ASSISTANT: Thanks for consulting us.