You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: Michael Lopez here.

ASSISTANT: Please share me your travel dates.

USER: My trip dates are 05/15 and 05/17.

ASSISTANT: Do you have any specifications?

USER: I need a lay off in my journey.

ASSISTANT: Sorry, there is no flight on your details.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you.