You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sandra Williams here.

ASSISTANT: How can I help you?

USER: Can you find a flight from LGA to OAK, to meet my brother on his birthday?

ASSISTANT: Sure, I am glad to help you. May I know your trip dates please?

USER: Sure, my journey dates should be 10/12 and 10/14.

ASSISTANT: Sorry to inform you that, there are no flights found on your preferable trip dates.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.