You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: My name is Elizabeth Rodriguez. I want to travel from BOS to SFO and searching to book a flight ticket.

ASSISTANT: Let me know your travel dates please.

USER: My travelling dates are from  01/18 to 01/20.

ASSISTANT: Thank you, please wait a minute.

USER: OK.

ASSISTANT: Thank you for waiting. Sorry Elizabeth, no flight has matched with your dates. Thank you for reaching us.

USER: It's OK.

ASSISTANT: Have a great day.

USER: Thank you.

ASSISTANT: Your welcome.