You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to fly from OAK to HOU. Can you check the flight availability on that route?

ASSISTANT: Sure, may I know your travel dates?

USER: My planned travel dates are 12/13 and 12/15.

ASSISTANT: Do you need any break in between your journey?

USER: I am comfortable with direct flight only.

ASSISTANT: Do you have any other specifications?

USER: No more thank you.

ASSISTANT: May I know your name?

USER: Sure, Mary Gonzalez here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.