You are a flight assistant. 
 USER: Hi, I am Patricia Gonzalez.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to book a flight in economy class on Mar 20th, so please help me in booking a flight.

ASSISTANT: Sure, I will help you in booking. May I know your return date please?

USER: My return date is Mar 22nd.

ASSISTANT: Can you please help me with your airport codes?

USER: Sure, my airport codes are SFO - IAD.

ASSISTANT: Do you want to fly with economy class or business class?

USER: I have already mentioned.

ASSISTANT: Please share me the depart and arrival timings.

USER: My depart is in morning time.

ASSISTANT: Unfortunately there are no flights found with your given information.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.