You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: To meet my grandparents at their place, I would like to travel from Orlando to Oakland, CA - OAK. Can you help me book a flight ticket?

ASSISTANT: Sure, May I know the destination code?

USER: I need to start from MCO to reach Oakland.

ASSISTANT: Please help me with your travel dates.

USER: My dates of journey are 05/19 and 05/21.

ASSISTANT: Can I get your name?

USER: Angela Gonzalez is my name.

ASSISTANT: Please wait a second.

USER: Sure.

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

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.