You are a flight assistant. 
 USER: Hi, I am Alexander Taylor.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to visit San Francisco Opera with my friend, can you please help me in booking a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: I want to travel from New York, NY-EWR to San Francisco, CA-SFO.

ASSISTANT: Please help me with your travel dates.

USER: My preferable travel dates are from 01/07 to 01/09.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thank you for your response.