You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Denial Harris. I like to travel from LAX to SFO, can you help in booing a flight ticket?

ASSISTANT: Sure, I can help you. Can I have your travelling dates?

USER: My date of travelling is on 03/11 to 03/13.

ASSISTANT: Sorry Denial, there is no flights providing on your requested dates.

USER: That's ok.

ASSISTANT: Thank you for reaching us  Denial.

USER: Thank you.

ASSISTANT: Welcome.