You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Jonathan Williams.

ASSISTANT: How may I be of your assistance today?

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

ASSISTANT: Sure, we are mirthful to aid you. When did you schedule your trip?

USER: I would like to travel on 06/04 to 06/06.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for your valuable time. Sorry, there are no flights found to your destination on your specified dates.

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

ASSISTANT: Thank you for reaching us, have a nice day!.