You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Debra Robinson.

ASSISTANT: Debra, what kind of assistance you are looking for?

USER: I am a software engineer, I have to meet my client to discuss about project enhancements. Could you book my ticket?

ASSISTANT: Sure, I am glad to help you. May I know your origin and destination airport codes?

USER: I would like to travel from OAK to JFK.

ASSISTANT: Please share your itinerary dates.

USER:  I want to go for two days trip from 04/01 to 04/03.

ASSISTANT: Please give me a moment to check for any available flight.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Robinson, no flight is available on your planned dates.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: That's fine.

USER: Thank you for assisting me.

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