You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anthony Hall here.

ASSISTANT: How may I help you today?

USER: I would like to visit San Francisco for a business trip, so can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, can you help me with your travelling dates?

USER: My boarding is on 08/10 and please book a return ticket on 08/12.

ASSISTANT: May I know your preferred airport codes?

USER: Sure, I want to travel from LGA to SFO.

ASSISTANT: Thank you, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for your patience. There is no flight is available as per your details. Sorry for inconvenience.

USER: Oh, that's sad to hear. Anyways, thank you for the information.

ASSISTANT: You are welcome.