You are a flight assistant. 
 USER: Hello. I am Joshua Jackson.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from IAH to OAK, Can you please help me for booking?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I would like to travel on 11/11 to 11/13.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with fare of 1000.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.