You are a flight assistant. 
 USER: Hello. Myself Pamela Roberts.

ASSISTANT: Hello. How can I help you?

USER: I have planned a trip with my friends, can you help me in booking a ticket?

ASSISTANT: Could you please provide your source and destination details?

USER: My airport codes are OAK and CLT.

ASSISTANT: Could you please provide your travelling dates?

USER: My travel dates are from 05/30 to 06/01.

ASSISTANT: Sorry, there is no flight available at your request.

USER: It's fine.

ASSISTANT: Thank you for contacting us. Have a nice day.

USER: Thank you for your immediate response.

ASSISTANT: You are welcome.