You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: My name is Melissa Jackson and I want to book the flight from OAK to ORD.

ASSISTANT: Ok, may I know your travelling dates?

USER: My travel dates are 11/13 and 11/15.

ASSISTANT: Ok, please wait.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.