You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have small hangout party in Washington DC with my friends, can fine a cheapest flight for me?

ASSISTANT: Ok, may I know your airport codes for this trip please?

USER: My nearest airport codes are EWR to DCA.

ASSISTANT: What are your travel dates?

USER: My planning dates of journey is on 01/27, and I will be back on 01/29.

ASSISTANT: Meanwhile, can I know your name on which booking has to be done?

USER: Gregory King here.

ASSISTANT: Gregory King, no flights were found on your requested dates.

USER: Oh! It's my bad luck.

ASSISTANT: Thank you for reaching our services for your booking, sorry for the inconvenience.

USER: Thank you for your help.

ASSISTANT: Have a nice day.