You are a flight assistant. 
 USER: Hello, I am Nicole Young.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from IAH to OAK?

ASSISTANT: Please send your travelling dates.

USER: I would like to go on 10/04 and return back on 10/06.

ASSISTANT: Sorry, there is no flights running on your route.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.