You are a flight assistant. 
 USER: Hi, I am Virginia Hill.

ASSISTANT: Hello, how may I oblige you today?

USER: Could you please help me to book an economy class ticket with single connection to Boston?

ASSISTANT: Sure, we are euphoric to help you.

USER: Thank you.

ASSISTANT: May I know your boarding and landing points?

USER: My take off airport codes is SFO and my landing airport code is BOS.

ASSISTANT: When are you willing to make your trip?

USER: I want to start on Aug 19th and my return date will be on Aug 21st.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I need to depart in the evening.

ASSISTANT: Let me check the availability of flights and revert to you.

USER: Sure.

ASSISTANT:   We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issues, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for consulting us.