You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Sandra Jackson, I would like to go from New York with the price of 500.

ASSISTANT: Ok. Please provide your travelling codes, to proceed further.

USER: My travelling airport codes are from EWR to SFO.

ASSISTANT: May I know your journey dates?

USER: My journey dates starts from 11/12 to 11/14.

ASSISTANT: Thanks for sharing your details, but no flights on respective dates of travel.

USER: Ok, no problem.

ASSISTANT: Thanks for Opting us, Have a great day.

USER: Thank you.