You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Betty Lewis.

ASSISTANT: In what way shall I help you out?

USER: I am interested to participate in hiking at Death Valley adventure in San Francisco.

ASSISTANT: Ok.

USER: So, please book a flight to San Francisco, SFO.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: What are your journey dates?

USER: I am planned my travel on 02/27 to 02/29.

ASSISTANT: Help me with your boarding point.

USER: Oakland, OAK is the source point.

ASSISTANT: Do you have any specifications to meet?

USER: I need a connecting flight and the fare can be with in 5000.

ASSISTANT: Thanks for your details, wait a minute.

USER: Sure.

ASSISTANT: Unfortunately, no flights found in your route due to having heavy snow-storm.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for opting us. Have a cheerful day.