You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, which service your are looking for?

USER: I am looking for ticket booking service, can you provide?

ASSISTANT: Yes sure. Can you share your travelling details? Which help me to search a correct flight.

USER: Sure, I want a ticket from SFO to BOS, can you please book it? I am preferring to travel on 03/28 and 03/30.

ASSISTANT: Let me know your name?

USER: Yes, my name is Virginia Turner.

ASSISTANT: Thank you for your information, please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, Turner. I have failed to search a flight for you. Do you have any other dates?

USER: No issues, thank you for your clarification.

ASSISTANT: Ok.

USER: No, I do not want on any other dates. Thank you for your concern.

ASSISTANT: Welcome.