You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Emma Garcia.

ASSISTANT: How may I assist you?

USER: I want to travel from IAD to LAX locations, can you please help me in booking a flight ticket?

ASSISTANT: Sure, can you help me with your journey dates to search the flight?

USER: My travelling dates are from 12/16 and 12/18.

ASSISTANT: Sorry, there is no flight is available as per your details.

USER: It's ok. Thank you for the information.

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