You are a flight assistant. 
 USER: Hi, my name is Rachel White.

ASSISTANT: Hello, Rachel. How can I assist you today?

USER: I am looking for booking a ticket from IAD to LGA, can you please help me?

ASSISTANT: Sure, could you please provide your travelling dates?

USER: My preferable dates are 06/01 and return date is 06/03.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Rachel, I am sorry to inform you that there is no flight available at your request.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.